<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-page-unsubscribe.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: Controller for unsubscribe page (unsubscribe link is sent in mass mailings)


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
    header('Location: ../');
    exit;
}

require_once QA_INCLUDE_DIR . 'qa-db-users.php';


//	Check we're not using single-sign on integration

if (QA_FINAL_EXTERNAL_USERS)
    qa_fatal_error('User login is handled by external code');


//	Check the code and unsubscribe the user if appropriate

$unsubscribed = false;
$loginuserid = qa_get_logged_in_userid();

$incode = trim(qa_get('c')); // trim to prevent passing in blank values to match uninitiated DB rows
$inhandle = qa_get('u');

if (!empty($inhandle)) { // match based on code and handle provided on URL
    $userinfo = qa_db_select_with_pending(qa_db_user_account_selectspec($inhandle, false));

    if (strtolower(trim(@$userinfo['emailcode'])) == strtolower($incode)) {
        qa_db_user_set_flag($userinfo['userid'], QA_USER_FLAGS_NO_MAILINGS, true);
        $unsubscribed = true;
    }
}

if ((!$unsubscribed) && isset($loginuserid)) { // as a backup, also unsubscribe logged in user
    qa_db_user_set_flag($loginuserid, QA_USER_FLAGS_NO_MAILINGS, true);
    $unsubscribed = true;
}


//	Prepare content for theme

$qa_content = qa_content_prepare();

$qa_content['title'] = qa_lang_html('users/unsubscribe_title');

if ($unsubscribed)
    $qa_content['error'] = strtr(qa_lang_html('users/unsubscribe_complete'), array(
        '^0' => qa_html(qa_opt('site_title')),
        '^1' => '<a href="' . qa_path_html('account') . '">',
        '^2' => '</a>',
    ));
else
    $qa_content['error'] = qa_insert_login_links(qa_lang_html('users/unsubscribe_wrong_log_in'), 'unsubscribe');


return $qa_content;


/*
	Omit PHP closing tag to help avoid accidental output
*/